1
|
Hanioka N, Isobe T, Saito K, Nagaoka K, Mori Y, Jinno H, Ohkawara S, Tanaka-Kagawa T. Hepatic glucuronidation of tetrabromobisphenol A and tetrachlorobisphenol A: interspecies differences in humans and laboratory animals and responsible UDP-glucuronosyltransferase isoforms in humans. Arch Toxicol 2024; 98:837-848. [PMID: 38182911 DOI: 10.1007/s00204-023-03659-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 12/07/2023] [Indexed: 01/07/2024]
Abstract
Tetrabromobisphenol A (TBBPA) and tetrachlorobisphenol A (TCBPA), bisphenol A (BPA) analogs, are endocrine-disrupting chemicals predominantly metabolized into glucuronides by UDP-glucuronosyltransferase (UGT) enzymes in humans and rats. In the present study, TBBPA and TCBPA glucuronidation by the liver microsomes of humans and laboratory animals (monkeys, dogs, minipigs, rats, mice, and hamsters) and recombinant human hepatic UGTs (10 isoforms) were examined. TBBPA glucuronidation by the liver microsomes followed the Michaelis-Menten model kinetics in humans, rats, and hamsters and the biphasic model in monkeys, dogs, minipigs, and mice. The CLint values based on the Eadie-Hofstee plots were mice (147) > monkeys (122) > minipigs (108) > humans (100) and rats (98) > dogs (81) > hamsters (47). TCBPA glucuronidation kinetics by the liver microsomes followed the biphasic model in all species except for minipigs, which followed the Michaelis-Menten model. The CLint values were monkeys (172) > rats (151) > mice (134) > minipigs (104), dogs (102), and humans (100) > hamsters (88). Among recombinant human UGTs examined, UGT1A1 and UGT1A9 showed higher TBBPA and TCBPA glucuronidation abilities. The kinetics of TBBPA and TCBPA glucuronidation followed the substrate inhibition model in UGT1A1 and the Michaelis-Menten model in UGT1A9. The CLint values were UGT1A1 (100) > UGT1A9 (42) for TBBPA glucuronidation and UGT1A1 (100) > UGT1A9 (53) for TCBPA glucuronidation, and the activities at high substrate concentration ranges were higher in UGT1A9 than in UGT1A1 for both TBBPA and TCBPA. These results suggest that the glucuronidation abilities toward TBBPA and TCBPA in the liver differ extensively across species, and that UGT1A1 and UGT1A9 expressed in the liver mainly contribute to the metabolism and detoxification of TBBPA and TCBPA in humans.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan.
| | - Takashi Isobe
- Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Keita Saito
- School of Pharmacy, Shujitsu University, 1-6-1 Nishigawara, Naka-ku, Okayama, 703-8516, Japan
| | - Kenjiro Nagaoka
- College of Pharmaceutical Sciences, Matsuyama University, 4-2 Bunkyo-cho, Matsuyama, 790-8578, Japan
| | - Yoko Mori
- Health and Environmental Risk Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
| | - Hideto Jinno
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Susumu Ohkawara
- Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Toshiko Tanaka-Kagawa
- Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| |
Collapse
|
2
|
Mori Y, Tanaka-Kagawa T, Tahara M, Kawakami T, Aoki A, Okamoto Y, Isobe T, Ohkawara S, Hanioka N, Azuma K, Sakai S, Jinno H. Species differences in activation of TRPA1 by resin additive-related chemicals relevant to indoor air quality. J Toxicol Sci 2023; 48:37-45. [PMID: 36599426 DOI: 10.2131/jts.48.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Transient Receptor Potential Ankyrin 1 (TRPA1), which is expressed in the airways, has causative and exacerbating roles in respiratory diseases. TRPA1 is known as a target of sick building syndrome-related air pollutants, such as formaldehyde. Thus, an in vitro TRPA1 activation assay would be useful for predicting the potential risk of air pollution. In this study, we used human TRPA1 (hTRPA1)- and mouse TRPA1 (mTRPA1)-expressing cell lines to measure TRPA1 activation by the emerging indoor air pollutants 2-ethyl-1-hexanol (2-EH), a mixture of 2,2,4-trimethyl-1,3-pentanediol 1- and 3-monoisobutyrate (Texanol), and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate (TXIB). The results indicated that 2-EH activated both hTRPA1 and mTRPA1 in a concentration-dependent manner, whereas TXIB did not activate hTRPA1 or mTRPA1. Texanol also activated hTRPA1 in a concentration-dependent manner. In contrast, a bell-shaped concentration-dependent curve was observed for mouse TRPA1 activation by Texanol, indicating inhibitory effects at a higher concentration range, which was also reported for menthol, a typical TRPA1 modulator. To further elucidate the mechanism underlying the species difference in TRPA1 activation by Texanol, V875G and G878V mutations were introduced into hTRPA1 and mTRPA1, respectively, which were reported to be key mutations for the inhibitory effect of menthol. These mutations switched the inhibitory effects of Texanol; thus, hTRPA1/V875G, but not mTRPA1/G878V, was inhibited at higher concentrations of Texanol. These results indicate that Texanol shares an interaction site with menthol. Overall, these findings suggest that careful interpretation is necessary when extrapolating rodent TRPA1-dependent toxicological effects to humans, especially with respect to the risk assessment of indoor air pollutants.
Collapse
Affiliation(s)
- Yoko Mori
- Faculty of Pharmacy, Meijo University
| | | | - Maiko Tahara
- Division of Environmental Chemistry, National Institute of Health Sciences
| | - Tsuyoshi Kawakami
- Division of Environmental Chemistry, National Institute of Health Sciences
| | | | | | - Takashi Isobe
- Faculty of Pharmacy, Yokohama University of Pharmacy
| | | | | | - Kenichi Azuma
- Department of Environmental Medicine and Behavioral Science, Kindai University Faculty of Medicine
| | - Shinobu Sakai
- Division of Environmental Chemistry, National Institute of Health Sciences
| | | |
Collapse
|
3
|
Mori Y, Aoki A, Okamoto Y, Isobe T, Ohkawara S, Hanioka N, Tanaka-Kagawa T, Jinno H. Isoform-Specific Quantification of Human Bitter Taste Receptor Transcripts Using Real-Time PCR Analysis. Biol Pharm Bull 2022; 45:1185-1190. [DOI: 10.1248/bpb.b22-00292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yoko Mori
- Faculty of Pharmacy, Meijo University
| | | | | | - Takashi Isobe
- Faculty of Pharmacy, Yokohama University of Pharmacy
| | | | | | | | | |
Collapse
|
4
|
Hanioka N, Tanaka-Kagawa T, Mori Y, Ikushiro S, Jinno H, Ohkawara S, Isobe T. Regioselective Glucuronidation of Flavones at C5, C7, and C4′ Positions in Human Liver and Intestinal Microsomes: Comparison among Apigenin, Acacetin, and Genkwanin. Biol Pharm Bull 2022; 45:1116-1123. [DOI: 10.1248/bpb.b22-00160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | | | - Yoko Mori
- Faculty of Pharmacy, Meijo University
| | | | | | - Susumu Ohkawara
- Department of Health Pharmacy, Yokohama University of Pharmacy
| | - Takashi Isobe
- Department of Health Pharmacy, Yokohama University of Pharmacy
| |
Collapse
|
5
|
Mori Y, Aoki A, Okamoto Y, Isobe T, Ohkawara S, Hanioka N, Tanaka-Kagawa T, Jinno H. Species-specific activation of transient receptor potential ankyrin 1 by phthalic acid monoesters. Biol Pharm Bull 2022; 45:1839-1846. [DOI: 10.1248/bpb.b22-00645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yoko Mori
- Faculty of Pharmacy, Meijo University
| | | | | | - Takashi Isobe
- Faculty of Pharmacy, Yokohama University of Pharmacy
| | | | | | | | | |
Collapse
|
6
|
Kitaguchi T, Mizota T, Ito M, Ohno K, Kobayashi K, Ogawa I, Qiu S, Iwao T, Hanioka N, Tanaka M, Matsunaga T. Simultaneous evaluation of membrane permeability and UDP-glucuronosyltransferase-mediated metabolism of food-derived compounds using human induced pluripotent stem cell-derived small intestinal epithelial cells. Drug Metab Dispos 2021; 50:17-23. [PMID: 34670778 DOI: 10.1124/dmd.121.000605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/18/2021] [Indexed: 11/22/2022] Open
Abstract
Pharmacokinetic prediction after oral ingestion is important for quantitative risk assessment of food-derived compounds. To evaluate the utility of human intestinal absorption prediction, we compared the membrane permeability and metabolic activities of human induced pluripotent stem cell-derived small intestinal epithelial cells (hiPSC-SIECs) with Caco-2 cells or human primary enterocytes (hPECs). We found that membrane permeability in hiPSC-SIECs had better predictivity than that in Caco-2 cells against 21 drugs with known human intestinal availability (r = 0.830 and 0.401, respectively). Membrane permeability in hiPSC-SIECs was only 0.019-0.25-fold as compared with that in Caco-2 cells for 7 in 15 food-derived compounds, primarily those which were reported to undergo glucuronidation metabolism. The metabolic rates of the glucuronide conjugate were similar or higher in hiPSC-SIECs as compared with hPECs, while lower in Caco-2 cells. Expression levels of UDP-glucuronosyltransferase (UGT) isoform mRNA in hiPSC-SIECs were similar or higher as compared with hPECs. Therefore, hiPSC-SIECs could be a useful tool for predicting human intestinal absorption, in order to simultaneously evaluate membrane permeability and UGT-mediated metabolism. Significance Statement Gastrointestinal absorption is an important step for predicting the internal exposure of food-derived compounds. This research revealed that human induced pluripotent stem cell-derived small intestinal cells (hiPSC-SIECs) had better predictivity of intestinal availability than Caco-2 cells; furthermore, the metabolic rates of UGT substrates of hiPSC-SIECs were closer those of human primary enterocytes than those of Caco-2 cells. Therefore, hiPSC-SIECs could be a useful tool for predicting human intestinal absorption to simultaneously evaluate membrane permeability and UGT-mediated metabolism.
Collapse
Affiliation(s)
- Takashi Kitaguchi
- Global Food Safety Institute, Nissin Foods Holdings Co., Ltd., Japan
| | - Taisei Mizota
- Global Food Safety Institute, Nissin Foods Holdings Co., Ltd., Japan
| | - Mina Ito
- Global Food Safety Institute, Nissin Foods Holdings Co., Ltd., Japan
| | - Katsutoshi Ohno
- Global Food Safety Institute, Nissin Foods Holdings Co., Ltd., Japan
| | | | - Isamu Ogawa
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan
| | - Shimeng Qiu
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan
| | | | - Nobumitsu Hanioka
- Department of Health Pharmacy, Yokohama University of Pharmacy, Japan
| | - Mitsuru Tanaka
- Global Food Safety Institute, Nissin Foods Holdings Co., Ltd., Japan
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Japan
| |
Collapse
|
7
|
Hanioka N, Saito K, Isobe T, Ohkawara S, Jinno H, Tanaka-Kagawa T. Favipiravir biotransformation in liver cytosol: Species and sex differences in humans, monkeys, rats, and mice. Biopharm Drug Dispos 2021; 42:218-225. [PMID: 33754379 DOI: 10.1002/bdd.2275] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/23/2021] [Accepted: 03/04/2021] [Indexed: 01/11/2023]
Abstract
Favipiravir is an antiviral agent effective against several RNA viruses that is converted into an inactive oxidative metabolite (M1), mainly by aldehyde oxidase, in humans. In the present study, the biotransformation of favipiravir into M1 in male and female humans, monkeys, rats, and mice was examined in an in vitro system using liver cytosolic fractions. The kinetics for M1 formation followed the Michaelis-Menten model in all species. The Km , Vmax , and CLint values in humans were 602 µM, 466 pmol/min/mg protein, and 776 nl/min/mg protein in males, respectively, and 713 µM, 404 pmol/min/mg protein, and 567 nl/min/mg protein in females, respectively. Species differences in CLint values were monkeys > humans > mice > rats in both males and females, and the variations for males and females were 120- and 96-fold, respectively. Sex differences in CLint values were males > females in humans and mice, females > males in monkeys and rats, and marked variation (4.3-fold) was noted in mice. This suggests that the roles of aldehyde oxidase in the hepatic metabolism of favipiravir differ extensively depending on the species and sex, and this study will aid in the assessment of the antiviral activities of favipiravir against novel and/or variant viruses.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | - Keita Saito
- School of Pharmacy, Shujitsu University, Okayama, Japan
| | - Takashi Isobe
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | - Susumu Ohkawara
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | - Hideto Jinno
- Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | | |
Collapse
|
8
|
Hanioka N, Isobe T, Tanaka-Kagawa T, Jinno H, Ohkawara S. In vitro glucuronidation of bisphenol A in liver and intestinal microsomes: interspecies differences in humans and laboratory animals. Drug Chem Toxicol 2020; 45:1565-1569. [PMID: 33187449 DOI: 10.1080/01480545.2020.1847133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Bisphenol A (BPA) is an endocrine-disrupting chemical, and is predominantly metabolized into glucuronide in mammals. The present study was conducted in order to examine the hepatic and intestinal glucuronidation of BPA in humans and laboratory animals such as monkeys, dogs, rats, and mice in an in vitro system using microsomal fractions. Km, Vmax, and CLint values in human liver microsomes were 7.54 µM, 17.7 nmol/min/mg protein, and 2.36 mL/min/mg protein, respectively. CLint values in liver microsomes of monkey, dogs, rats, and mice were 1.5-, 2.4-, 1.7- and 8.2-fold that of humans, respectively. In intestinal microsomes, Km, Vmax, and CLint values in humans were 39.3 µM, 0.65 nmol/min/mg protein, and 0.02 mL/min/mg protein, respectively. The relative levels of CLint in monkey, dogs, rats, and mice to that of humans were 7.0-, 12-, 34-, and 29-fold, respectively. Although CLint values were higher in liver microsomes than in intestinal microsomes in all species, and marked species difference in the ratio of liver to intestinal microsomes was observed as follows: humans, 118; monkeys, 25; dogs, 23; rats, 5.9; mice, 33. These results suggest that the functional roles of UDP-glucuronosyltransferase (UGT) enzymes expressed in the liver and intestines in the metabolism of BPA extensively differ among humans, monkeys, dogs, rats, and mice.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | - Takashi Isobe
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | | | - Hideto Jinno
- Faculty of Pharmacy, Meijo University, Nagoya, Japan
| | - Susumu Ohkawara
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| |
Collapse
|
9
|
Hanioka N, Isobe T, Tanaka-Kagawa T, Ohkawara S. Wogonin glucuronidation in liver and intestinal microsomes of humans, monkeys, dogs, rats, and mice. Xenobiotica 2020; 50:906-912. [PMID: 32005083 DOI: 10.1080/00498254.2020.1725180] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Wogonin, one of the flavonoids isolated from Scutellaria baicalensis, exhibits some beneficial bioactivities, including anti-inflammatory and anticancer effects, and is metabolized into glucuronide by UDP-glucuronosyltransferase (UGT) enzymes in humans. In the present study, wogonin glucuronidation was examined in the liver and intestinal microsomes of humans, monkeys, dogs, rats, and mice using a kinetic analysis.The kinetics of wogonin glucuronidation by liver microsomes followed the biphasic model in all species examined. CLint values (x-intercept) based on v versus V/[S] plots were rats > humans ≈ monkeys > mice > dogs. The kinetics of intestinal microsomes fit the Michaelis-Menten model for humans, monkeys, rats, and mice and the substrate inhibition model for dogs. CLint values were rats > monkeys > mice > dogs > humans. The tissue dependence of CLint values was liver microsomes > intestinal microsomes for humans, dogs, and rats, and liver microsomes ≈ intestinal microsomes for monkeys and mice.These results demonstrated that the metabolic abilities of UGT enzymes toward wogonin in the liver and intestines markedly differ among humans, monkeys, dogs, rats, and mice, and suggest that species differences are closely associated with the biological effects of wogonin.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | - Takashi Isobe
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| | | | - Susumu Ohkawara
- Department of Health Pharmacy, Yokohama University of Pharmacy, Yokohama, Japan
| |
Collapse
|
10
|
Hanioka N, Isobe T, Ohkawara S, Ochi S, Tanaka-Kagawa T, Jinno H. Hydrolysis of di(2-ethylhexyl) phthalate in humans, monkeys, dogs, rats, and mice: An in vitro analysis using liver and intestinal microsomes. Toxicol In Vitro 2018; 54:237-242. [PMID: 30315871 DOI: 10.1016/j.tiv.2018.10.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 10/09/2018] [Accepted: 10/09/2018] [Indexed: 11/25/2022]
Abstract
Di(2-ethylhexyl) phthalate (DEHP) is a widely used plasticizer that is rapidly metabolized to mono(2-ethylhexyl) phthalate (MEHP), an active metabolite, in mammals. In the present study, the hydrolysis of DEHP by the liver and intestinal microsomes of humans, monkeys, dogs, rats, and mice was examined. The kinetics of liver microsomes fit the Michaelis-Menten model for humans, monkeys, and rats, and the Hill model for dogs and mice. Km or S50 values were similar among species, whereas Vmax exhibited species differences of approximately 9-fold. CLint or CLmax values were in the order of mice > dogs > monkeys ≥ rats > humans. Hydrolytic activity towards DEHP was not detected in the intestinal microsomes of humans or dogs. The kinetics of monkeys, rats, and mice followed the Hill model. In comparisons of the liver microsomes of each species, S50 values were similar, while Vmax and CLmax values (mice > rats > monkeys) were considerably lower (approximately 5-25%). These results suggest that hydrolytic activity towards DEHP in the liver and intestines markedly differ among humans and non-rodent and rodent experimental animals, and imply that species differences are closely associated with the toxicity of DEHP.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Laboratory of Xenobiotic Metabolism, Department of Life Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan.
| | - Takashi Isobe
- Laboratory of Xenobiotic Metabolism, Department of Life Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Susumu Ohkawara
- Laboratory of Environmental Toxicology, Department of Life Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Sadayuki Ochi
- Laboratory of Xenobiotic Metabolism, Department of Life Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Toshiko Tanaka-Kagawa
- Laboratory of Environmental Toxicology, Department of Life Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Hideto Jinno
- Laboratory of Hygienic Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya 468-8503, Japan
| |
Collapse
|
11
|
Taguchi M, Shigeyama M, Ogawa N, Murata M, Hanioka N, Yamamoto H, Teramachi H. Evaluation of Tumor Tissue Fixation Effects of Formulation Modified Mohs Pastes in Mice and Their Water-Absorbing Properties. Biol Pharm Bull 2018; 41:1824-1829. [PMID: 30282851 DOI: 10.1248/bpb.b18-00528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mohs paste (MP) is a hospital preparation containing zinc hydrochloride and zinc oxide starch. It is a topical medication used to fixate tissues for the removal of inoperable skin tumors and the management of hemorrhage and exudates, and to prevent foul odor resulting from secondary infections. However, it has problems, such as changes in hardness and viscoelasticity with time and liquefaction by exudate. It has been reported that the modified MP with D-sorbitol (S-MP) and the modified MP using the cellulose instead of starch (C-MP) have excellent physicochemical stability and better handling than original MP (O-MP). In this study, the effect of prescription improvement of MP on the pharmacological effect was examined with reference to water absorbing property, and its tumor tissue invasion fixation depth as an indicator. In the S-MP and C-MP, the amounts of water absorption did not differ significantly from those in the O-MP. The hardness of S-MP was decreased and liquefied like O-MP after absorbing water. In contrast, C-MP retained its form even after water absorption. The subcutaneous tumors in mice treated with modified MP formulations were measured for invasion fixation depth at 6 and 24 h after application. And the tissue status was observed using computed tomography. In all MPs, invasion fixation depth increased depending on application time. S-MP and O-MP depths did not differ significantly. The invasion depths of the C-MP significantly increased compared with those in the O-MP. These results suggest that C-MP had a high tissue fixation rate.
Collapse
Affiliation(s)
- Maho Taguchi
- Center for Clinical Pharmacy, Yokohama University of Pharmacy.,Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University
| | - Masato Shigeyama
- Laboratory of Clinical Pharmacy, Gifu Pharmaceutical University.,Graduate School of Health and Medicine, Gifu University of Medical Science
| | - Noriko Ogawa
- Laboratory of Pharmaceutical Engineering, Aichi Gakuin University
| | - Mikio Murata
- Center for Clinical Pharmacy, Yokohama University of Pharmacy
| | - Nobumitsu Hanioka
- Laboratory of Xenobiotic Metabolism, Department of Health Pharmacy, Yokohama University of Pharmacy
| | | | | |
Collapse
|
12
|
Hanioka N, Ohkawara S, Isobe T, Ochi S, Tanaka-Kagawa T, Jinno H. Regioselective glucuronidation of daidzein in liver and intestinal microsomes of humans, monkeys, rats, and mice. Arch Toxicol 2018; 92:2809-2817. [DOI: 10.1007/s00204-018-2265-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 07/12/2018] [Indexed: 12/22/2022]
|
13
|
Miyata-Nozaka Y, Zain SM, Taguchi M, Shigeyama M, Isobe T, Hanioka N. Carbamazepine 10,11-epoxidation in human liver microsomes: influence of the CYP3A5*3 polymorphism. Pharmazie 2017; 72:747-750. [PMID: 29441960 DOI: 10.1691/ph.2017.7754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Carbamazepine (CBZ) is a commonly prescribed antiepileptic drug, and is mainly metabolized to 10,11-CBZ epoxide in humans. Its biotransformation is catalyzed by cytochrome P450 (CYP) enzymes, with the predominant isoforms being CYP3A4 and CYP3A5. In the present study, the effects of the CYP3A5*3 (rs776746) polymorphism on CBZ 10,11-epoxidation in human liver microsomes genotyped as CYP3A5*3 were examined using a kinetic analysis. The kinetics for CBZ 10,11-epoxidation fit the Hill model with n of approximately 1.9-2.1 in all liver microsomes of the wild-type (CYP3A5*1/*1) and heterozygous (CYP3A5*1/*3) and homozygous (CYP3A5*3/*3) variants. The S50, Vmax, and CLmax values of wild-type liver microsomes were 263-327 μM, 793-1590 pmol/min/mg protein, and 1.51-2.95 μL/min/mg protein, respectively. The Vmax and CLmax values of liver microsomes of the heterozygous variant were approximately 15-40% those of wild-type liver microsomes. On the other hand, the Vmax and CLmax values of liver microsomes of the homozygous variant were more similar to those of the wild-type than the heterozygous variant. These results suggest that the CYP3A5*3 polymorphism has a negligible effect on CBZ 10,11-epoxidation in an in vitro system using human liver microsomes.
Collapse
|
14
|
Isobe T, Ohkawara S, Tanaka-Kagawa T, Jinno H, Hanioka N. Hepatic glucuronidation of 4-tert-octylphenol in humans: inter-individual variability and responsible UDP-glucuronosyltransferase isoforms. Arch Toxicol 2017; 91:3543-3550. [PMID: 28500425 DOI: 10.1007/s00204-017-1982-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 05/08/2017] [Indexed: 01/22/2023]
Abstract
4-tert-Octylphenol (4-tOP) is an endocrine-disrupting chemical. It is mainly metabolized into glucuronide by UDP-glucuronosyltransferase (UGT) enzymes in humans. The purpose of this study was to assess inter-individual variability in and the possible roles of UGT isoforms in hepatic 4-tOP glucuronidation in the humans. 4-tOP glucuronidation activities in the liver microsomes and recombinant UGTs of humans were assessed at broad substrate concentrations, and kinetics were analyzed. Correlation analyses between 4-tOP and diclofenac or 4-hydroxybiphenyl activities in pooled and individual human liver microsomes were also performed. Typical CLint values were 17.8 mL/min/mg protein for the low type, 25.2 mL/min/mg protein for the medium type, and 47.7 mL/min/mg protein for the high type. Among the recombinant UGTs (13 isoforms) examined, UGT2B7 and UGT2B15 were the most active of catalyzing 4-tOP glucuronidation. Although the K m values of UGT2B7 and UGT2B15 were similar (0.36 and 0.42 µM, respectively), the CLint value of UGT2B7 (6.83 mL/min/mg protein) >UGT2B15 (2.35 mL/min/mg protein). Strong correlations were observed between the glucuronidation activities of 4-tOP and diclofenac (a probe for UGT2B7) or 4-hydroxybiphenyl (a probe for UGT2B15) with 0.79-0.88 of Spearman correlation coefficient (r s) values. These findings demonstrate that 4-tOP glucuronidation in humans is mainly catalyzed by hepatic UGT2B7 and UGT2B15, and suggest that these UGT isoforms play important and characteristic roles in the detoxification of 4-tOP.
Collapse
Affiliation(s)
- Takashi Isobe
- Laboratory of Xenobiotic Metabolism, Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Susumu Ohkawara
- Laboratory of Environmental Toxicology, Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Toshiko Tanaka-Kagawa
- Laboratory of Environmental Toxicology, Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Hideto Jinno
- Laboratory of Hygienic Chemistry, Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| | - Nobumitsu Hanioka
- Laboratory of Xenobiotic Metabolism, Department of Health Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan.
| |
Collapse
|
15
|
Taguchi M, Shigeyama M, Ito N, Ogawa N, Takahashi C, Murata M, Hanioka N, Yamamoto H, Teramachi H. Preparation and Evaluation of Modified Mohs Paste without Starch. YAKUGAKU ZASSHI 2017; 137:477-484. [PMID: 28381726 DOI: 10.1248/yakushi.16-00248] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mohs paste is an external preparation containing zinc hydrochloride and zinc oxide starch as the main ingredient, and it is used for the palliative treatment of patients with surgically untreatable malignant tumors. However, it has problems, such as changes in hardness and viscoelasticity with time and liquefaction by exudate. To overcome these problems, we modified the formulation of Mohs paste by excluding starch, which is the cause of physical changes, and investigated the base. In the modified Mohs paste using the macrogol ointment for the base, no marked change with time was noted in the hardness, malleability, or elongation property, and the water-absorbing properties were equivalent to those of Mohs paste immediately after preparation. The hardness did not decrease even after absorbing water. The drug release rate increased 1.5 times with the modified Mohs paste. Based on these findings, the risk of liquefaction-associated damage of the surrounding skin decreased on using the modified Mohs paste, and preparing in advance became possible. These results suggest that the modified Mohs paste using the macrogol ointment for the base exhibits an equivalent effect for control of exudate and a high effect for tissue fixation.
Collapse
Affiliation(s)
- Maho Taguchi
- Center for Clinical Pharmacy, Yokohama University of Pharmacy
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Hanioka N, Isobe T, Ohkawara S, Tanaka-Kagawa T, Jinno H. Glucuronidation of 4-tert-octylphenol in humans, monkeys, rats, and mice: an in vitro analysis using liver and intestine microsomes. Arch Toxicol 2016; 91:1227-1232. [DOI: 10.1007/s00204-016-1800-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 07/07/2016] [Indexed: 11/28/2022]
|
17
|
Hanioka N, Kinashi Y, Tanaka-Kagawa T, Isobe T, Jinno H. Glucuronidation of mono(2-ethylhexyl) phthalate in humans: roles of hepatic and intestinal UDP-glucuronosyltransferases. Arch Toxicol 2016; 91:689-698. [DOI: 10.1007/s00204-016-1708-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 04/06/2016] [Indexed: 01/06/2023]
|
18
|
Isobe T, Kofuji K, Okada K, Fujimori J, Murata M, Shigeyama M, Hanioka N, Murata Y. Adsorption of histones on natural polysaccharides: The potential as agent for multiple organ failure in sepsis. Int J Biol Macromol 2015; 84:54-7. [PMID: 26627603 DOI: 10.1016/j.ijbiomac.2015.11.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 10/29/2015] [Accepted: 11/12/2015] [Indexed: 11/24/2022]
Abstract
Histones are intracellular proteins that are structural elements of nuclear chromatin and regulate gene transcription. However, the extracellular histones released in response to bacterial challenges have been identified as mediators contributing to endothelial dysfunction, organ failure, and death during sepsis. In the present study, the adsorption of histones as well as plasma proteins (α1-acid glycoprotein (AGP), albumin, and γ-globulin) on alginic acid, pectin, dextran, and chitosan was examined in order to evaluate the potential of natural polysaccharides as therapeutic agents for multiple organ failure in sepsis. Alginic acid and pectin strongly adsorbed histones, whereas the adsorption abilities of dextran and chitosan toward histones were very low or negligible. Among the natural polysaccharides examined, only alginic acid did not adsorb any of the plasma proteins. These results demonstrated that alginic acid strongly adsorbed histones, but not plasma proteins; therefore, it has potential as a candidate drug for the treatment of multiple organ failure in sepsis.
Collapse
Affiliation(s)
- Takashi Isobe
- Department of Biochemical Toxicology, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan.
| | - Kyoko Kofuji
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3, Kanagawa-machi, Kanazawa 920-1181, Japan
| | - Kenji Okada
- Department of Clinical Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Junya Fujimori
- Department of Clinical Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Mikio Murata
- Department of Clinical Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Masato Shigeyama
- Department of Clinical Pharmacy, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Nobumitsu Hanioka
- Department of Biochemical Toxicology, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama 245-0066, Japan
| | - Yoshifumi Murata
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3, Kanagawa-machi, Kanazawa 920-1181, Japan
| |
Collapse
|
19
|
Hanioka N, Isobe T, Kinashi Y, Tanaka-Kagawa T, Jinno H. Hepatic and intestinal glucuronidation of mono(2-ethylhexyl) phthalate, an active metabolite of di(2-ethylhexyl) phthalate, in humans, dogs, rats, and mice: an in vitro analysis using microsomal fractions. Arch Toxicol 2015; 90:1651-7. [PMID: 26514348 DOI: 10.1007/s00204-015-1619-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 10/19/2015] [Indexed: 01/02/2023]
Abstract
Mono(2-ethylhexyl) phthalate (MEHP) is an active metabolite of di(2-ethylhexyl) phthalate (DEHP) and has endocrine-disrupting effects. MEHP is metabolized into glucuronide by UDP-glucuronosyltransferase (UGT) enzymes in mammals. In the present study, the hepatic and intestinal glucuronidation of MEHP in humans, dogs, rats, and mice was examined in an in vitro system using microsomal fractions. The kinetics of MEHP glucuronidation by liver microsomes followed the Michaelis-Menten model for humans and dogs, and the biphasic model for rats and mice. The K m and V max values of human liver microsomes were 110 µM and 5.8 nmol/min/mg protein, respectively. The kinetics of intestinal microsomes followed the biphasic model for humans, dogs, and mice, and the Michaelis-Menten model for rats. The K m and V max values of human intestinal microsomes were 5.6 µM and 0.40 nmol/min/mg protein, respectively, for the high-affinity phase, and 430 µM and 0.70 nmol/min/mg protein, respectively, for the low-affinity phase. The relative levels of V max estimated by Eadie-Hofstee plots were dogs (2.0) > mice (1.4) > rats (1.0) ≈ humans (1.0) for liver microsomes, and mice (8.5) > dogs (4.1) > rats (3.1) > humans (1.0) for intestinal microsomes. The percentages of the V max values of intestinal microsomes to liver microsomes were mice (120 %) > rats (57 %) > dogs (39 %) > humans (19 %). These results suggest that the metabolic abilities of UGT enzymes expressed in the liver and intestine toward MEHP markedly differed among species, and imply that these species differences are strongly associated with the toxicity of DEHP.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Department of Biochemical Toxicology, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan.
| | - Takashi Isobe
- Department of Biochemical Toxicology, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Yu Kinashi
- Faculty of Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama, 700-8530, Japan
| | - Toshiko Tanaka-Kagawa
- Department of Biochemical Toxicology, Yokohama University of Pharmacy, 601 Matano-cho, Totsuka-ku, Yokohama, 245-0066, Japan
| | - Hideto Jinno
- Faculty of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, 468-8503, Japan
| |
Collapse
|
20
|
Kishi N, Takasuka A, Kokawa Y, Isobe T, Taguchi M, Shigeyama M, Murata M, Suno M, Hanioka N. Raloxifene glucuronidation in liver and intestinal microsomes of humans and monkeys: contribution of UGT1A1, UGT1A8 and UGT1A9. Xenobiotica 2015; 46:289-95. [PMID: 26247833 DOI: 10.3109/00498254.2015.1074301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. Raloxifene is an antiestrogen that has been marketed for the treatment of osteoporosis, and is metabolized into 6- and 4'-glucuronides by UDP-glucuronosyltransferase (UGT) enzymes. In this study, the in vitro glucuronidation of raloxifene in humans and monkeys was examined using liver and intestinal microsomes and recombinant UGT enzymes (UGT1A1, UGT1A8 and UGT1A9). 2. Although the K(m) and CL(int) values for the 6-glucuronidation of liver and intestinal microsomes were similar between humans and monkeys, and species differences in Vmax values (liver microsomes, humans > monkeys; intestinal microsomes, humans < monkeys) were observed, no significant differences were noted in the K(m) or S50, Vmax and CL(int) or CLmax values for the 4'-glucuronidation of liver and intestinal microsomes between humans and monkeys. 3. The activities of 6-glucuronidation in recombinant UGT enzymes were UGT1A1 > UGT1A8 >UGT1A9 for humans, and UGT1A8 > UGT1A1 > UGT1A9 for monkeys. The activities of 4'-glucuronidation were UGT1A8 > UGT1A1 > UGT1A9 in humans and monkeys. 4. These results demonstrated that the profiles for the hepatic and intestinal glucuronidation of raloxifene by microsomes were moderately different between humans and monkeys.
Collapse
Affiliation(s)
- Naoki Kishi
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | - Akane Takasuka
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | - Yuki Kokawa
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | | | - Maho Taguchi
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Masato Shigeyama
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Mikio Murata
- c Department of Clinical Pharmacy , Yokohama University of Pharmacy , Yokohama , Japan
| | - Manabu Suno
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan
| | | |
Collapse
|
21
|
Miyake Y, Hirose R, Isobe T, Hanioka N. Molecular cloning and functional analysis of minipig UDP-glucuronosyltransferase 1A6. Xenobiotica 2015; 46:193-9. [PMID: 26134041 DOI: 10.3109/00498254.2015.1060373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. UDP-glucuronosyltransferase 1A6 (UGT1A6) plays important roles in the glucuronidation of numerous drugs, environmental pollutants, and endogenous substances. Minipigs have been used as experimental animals in pharmacological and toxicological studies because many of their physiological characteristics are similar to those of humans. The aim of the present study was to examine similarities and differences in the enzymatic properties of UGT1A6 between humans and minipigs. 2. Minipig UGT1A6 (mpUGT1A6) cDNA was cloned by the RACE method, and the corresponding proteins were expressed in insect cells. The enzymatic function of mpUGT1A6 was analyzed by the kinetics of serotonin glucuronidation. 3. Amino acid homology between human UGT1A6 (hUGT1A6) and mpUGT1A6 was 79.9%. The kinetics of serotonin glucuronidation by recombinant hUGT1A6 and mpUGT1A6 enzymes fit the Michaelis-Menten equation. The Km, Vmax, and CLint values of hUGT1A6 were 10.5 mM, 4.04 nmol/min/mg protein, and 0.39 µL/min/mg protein, respectively. The Km value of mpUGT1A6 was similar to that of hUGT1A6, whereas the Vmax and CLint values of mpUGT1A6 were approximately 2-fold higher than those of hUGT1A6. 4. These results suggest that the enzymatic properties of UGT1A6 enzymes are moderately different between humans and minipigs.
Collapse
Affiliation(s)
- Yuuka Miyake
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan and
| | - Riho Hirose
- a Faculty of Pharmaceutical Sciences , Okayama University , Okayama , Japan and
| | - Takashi Isobe
- b Department of Biochemical Toxicology , Yokohama University of Pharmacy , Yokohama , Japan
| | - Nobumitsu Hanioka
- b Department of Biochemical Toxicology , Yokohama University of Pharmacy , Yokohama , Japan
| |
Collapse
|
22
|
Mukai M, Isobe T, Okada K, Murata M, Shigeyama M, Hanioka N. Species and sex differences in propofol glucuronidation in liver microsomes of humans, monkeys, rats and mice. Pharmazie 2015; 70:466-470. [PMID: 26373207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Propofol (2,6-diisopropylphenol) is a short-acting anesthetic commonly used in clinical practice, and is rapidly metabolized into glucuronide by UDP-glucuronosyltransferase (UGT). In the present study, propofol glucuronidation was examined in the liver microsomes of male and female humans, monkeys, rats, and mice. The kinetics of propofol glucuronidation by liver microsomes fit the substrate inhibition model for humans and mice, the Hill model for monkeys, and the isoenzyme (biphasic) model for rats. The K(m), V(max), and CL(int) values of human liver microsomes were 50 μM, 5.6 nmol/min/mg protein, and 110 μL/min/mg protein, respectively, for males, and 46 μM, 6.0 nmol/min/mg protein, and 130 μL/min/mg protein, respectively, for females. The rank order of the CL(int) or CL(max) (in vitro clearance) values of liver microsomes was mice humans > monkeys > rats (high-affinity phase) rats (low-affinity phase) in both males and females. Although no significant sex differences were observed in the values of kinetic parameters in any animal species, the in vitro clearance values of liver microsomes were males < females in humans, males = females in rats (low-affinity phase), and males > females in monkeys, rats (high-affinity phase), and mice. These results demonstrated that the kinetic profile of propofol glucuronidation by liver microsomes markedly differed among humans, monkeys, rats, and mice, and suggest that species and sex differences exist in the roles of UGT isoform(s), including UGT1A9, involved in its metabolism.
Collapse
|
23
|
Mukai M, Tanaka S, Yamamoto K, Murata M, Okada K, Isobe T, Shigeyama M, Hichiya H, Hanioka N. In vitro glucuronidation of propofol in microsomal fractions from human liver, intestine and kidney: tissue distribution and physiological role of UGT1A9. Pharmazie 2014; 69:829-832. [PMID: 25985579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Propofol (2,6-diisopropylphenol) is intravenously administered for anesthetic induction and maintenance, and is rapidly metabolized into its glucuronide, mainly by UDP-glucuronosyltransferase 1A9 (UGT1A9). In this study, propofol glucuronidation by liver microsomes (HLM), intestinal microsomes (HIM) and kidney microsomes (HKM) of humans were examined. The expression of UGT1A9 protein in HLM, HIM and HKM was analyzed by immunoblotting. The staining band intensities for UGT1A9 of HIM and HKM were 12% and 119% those of HLM, respectively. The kinetics of propofol glucuronidation by HLM and HKM exhibited substrate inhibition, whereas the kinetics by HIM followed the Michaelis-Menten model. The K(m), V(max) and CL(int) values of HLM were 41.8 μM, 5.21 nmol/min/mg protein and 126 μl/min/mg protein, respectively. The K(m) value of HIM was significantly higher (6.7-fold) than that of HLM, and the V(max) and CL(int) values were significantly lower (56% and 8.3%, respectively) than those of HLM. The K(m) value of HKM was comparable to that of HLM, and the V(max) and CL(int) values were significantly higher (2.1- and 3.7-fold, respectively) than those of HLM, respectively. These findings suggest that UGT1A9 expressed in the kidney as well as in the liver plays an important role in propofol glucuronidation. The information gained in this study should contribute to an appropriate use of drugs metabolized by UGT1A9.
Collapse
|
24
|
|
25
|
Yamamoto K, Mukai M, Nagaoka K, Hayashi K, Hichiya H, Okada K, Murata M, Shigeyama M, Narimatsu S, Hanioka N. Functional characterization of cynomolgus monkey UDP-glucuronosyltransferase 1A9. Eur J Drug Metab Pharmacokinet 2014; 39:195-202. [DOI: 10.1007/s13318-014-0177-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 01/09/2014] [Indexed: 10/25/2022]
|
26
|
Takahara Y, Kinashi Y, Takahara Y, Hichiya H, Okada K, Murata M, Shigeyama M, Hanioka N. Butylbenzyl Phthalate Hydrolysis in Liver Microsomes of Humans, Monkeys, Dogs, Rats and Mice. Biol Pharm Bull 2014; 37:703-6. [DOI: 10.1248/bpb.b14-00002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yuka Takahara
- Faculty of Pharmaceutical Sciences, Okayama University
| | - Yu Kinashi
- Faculty of Pharmaceutical Sciences, Okayama University
| | | | - Hiroyuki Hichiya
- Laboratory of Biochemical Toxicology, Yokohama College of Pharmacy
| | - Kenji Okada
- Laboratory of Clinical Pharmaceutics, Yokohama College of Pharmacy
| | - Mikio Murata
- Laboratory of Pharmaceutics, Yokohama College of Pharmacy
| | - Masato Shigeyama
- Laboratory of Clinical Pharmaceutics, Yokohama College of Pharmacy
| | | |
Collapse
|
27
|
Narimatsu S, Mayumi K, Hanioka N, Masuda K, Naito S, Miyata A. Differences in the catalytic properties of CYP2B6s between common marmoset and human. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.270.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shizuo Narimatsu
- Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | - Kei Mayumi
- Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | - Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical SciencesOkayama UniversityOkayamaJapan
| | | | | | - Atsuro Miyata
- Graduate School of Medicine and DentistryKagoshima UniversityKagoshimaJapan
| |
Collapse
|
28
|
Mayumi K, Hanioka N, Masuda K, Koeda A, Naito S, Miyata A, Narimatsu S. Characterization of marmoset CYP2B6: cDNA cloning, protein expression and enzymatic functions. Biochem Pharmacol 2013; 85:1182-94. [PMID: 23395694 DOI: 10.1016/j.bcp.2013.01.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 01/28/2013] [Accepted: 01/28/2013] [Indexed: 02/05/2023]
Abstract
The common marmoset is a promising species for evaluating the safety of drug candidates. To further understand the capacity for drug metabolism in marmosets, a cDNA encoding a CYP2B enzyme was cloned from the total RNA fraction of marmoset liver by 3'- and 5'-RACE methods. Nucleotide and deduced amino acid sequences showed 90.8 and 86.2% identity, respectively, with human CYP2B6. The marmoset CYP2B6 (marCYP2B6) protein was expressed in insect cells, and its enzymatic properties were compared with those of human (humCYP2B6) and cynomolgus monkey (cynCYP2B6) orthologs in liver and insect cell microsomes. Enzymatic functions were examined for the oxidation of 7-ethoxy-4-(trifluoromethyl)coumarin (7-ETC), bupropion (BUP) and efavirenz (EFV). The kinetic profiles for the oxidation of the three substrates by liver microsomal fractions were similar between humans and cynomolgus monkeys (biphasic for 7-ETC and monophasic for BUP and EFV), but that of marmosets was unique (monophasic for 7-ETC and biphasic for BUP and EFV). Recombinant enzymes, humCYP2B6 and cynCYP2B6, also yielded similar kinetic profiles for the oxidation of the three substrates, whereas marCYP2B6 showed activity only for 7-ETC hydroxylation. In silico docking simulations suggested that two amino acid residues, Val-114 and Leu-367, affect the activity of marCYP2B6. In fact, a marCYP2B6 mutant with substitutions V114I and L367V exhibited BUP hydroxylase activity that was 4-fold higher than that of humCYP2B6, while its EFV 8-hydroxylase activity was only 10% that of the human enzyme. These results indicate that the amino acids at positions 114 and 367 affect the enzymatic capacity of marmoset CYP2B6.
Collapse
Affiliation(s)
- Kei Mayumi
- Laboratory of Health Chemistry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | | | | | | | | | | | | |
Collapse
|
29
|
Kuze J, Mutoh T, Takenaka T, Oda N, Hanioka N, Narimatsu S. Evaluation of animal models for intestinal first-pass metabolism of drug candidates to be metabolized by CYP3A enzymes via in vivo and in vitro oxidation of midazolam and triazolam. Xenobiotica 2013; 43:598-606. [PMID: 23282066 DOI: 10.3109/00498254.2012.751517] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
1. To search an appropriate evaluation methodology for the intestinal first-pass metabolism of new drug candidates, grapefruit juice (GFJ)- and vehicle (tap water)-pretreated mice or rats were orally administered midazolam (MDZ) or triazolam (TRZ), and blood levels of the parent compounds and their metabolites were measured by liquid chromatography/MS/MS. A significant effect of GFJ to elevate the blood levels was observed only for TRZ in mice. 2. In vitro experiments using mouse, rat and human intestinal and hepatic microsomal fractions demonstrated that GFJ suppressed the intestinal microsomal oxidation of MDZ and especially TRZ. Substrate inhibition by MDZ caused reduction in 1'-hydroxylation but not 4-hydroxylation in both intestinal and hepatic microsomal fractions. The kinetic profiles of MDZ oxidation and the substrate inhibition in mouse intestinal and hepatic microsomal fractions were very similar to those in human microsomes but were different from those in rat microsomes. Furthermore, MDZ caused mechanism-based inactivation of cytochrome P450 3A-dependent TRZ 1'-hydroxylation in mouse, rat and human intestinal microsomes with similar potencies. 3. These results are useful information in the analysis of data obtained in mouse and rat for the evaluation of first-pass effects of drug candidates to be metabolized by CYP3A enzymes.
Collapse
Affiliation(s)
- J Kuze
- Tsukuba Research Center, Taiho Pharmaceutical Company, Ibaraki, Japan
| | | | | | | | | | | |
Collapse
|
30
|
Miyake Y, Mayumi K, Jinno H, Tanaka-Kagawa T, Narimatsu S, Hanioka N. cDNA Cloning and Functional Analysis of Minipig Uridine Diphosphate-Glucuronosyltransferase 1A1. Biol Pharm Bull 2013; 36:452-61. [DOI: 10.1248/bpb.b12-00986] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yuuka Miyake
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Kei Mayumi
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Hideto Jinno
- Division of Environmental Chemistry, National Institute of Health Sciences
| | | | - Shizuo Narimatsu
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| | - Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University
| |
Collapse
|
31
|
Hanioka N, Takahara Y, Takahara Y, Tanaka-Kagawa T, Jinno H, Narimatsu S. Hydrolysis of di-n-butyl phthalate, butylbenzyl phthalate and di(2-ethylhexyl) phthalate in human liver microsomes. Chemosphere 2012; 89:1112-1117. [PMID: 22739543 DOI: 10.1016/j.chemosphere.2012.05.095] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 05/01/2012] [Accepted: 05/29/2012] [Indexed: 06/01/2023]
Abstract
Diester phthalates are industrial chemicals used primarily as plasticizers to import flexibility to polyvinylchloride plastics. In this study, we examined the hydrolysis of di-n-butyl phthalate (DBP), butylbenzyl phthalate (BBzP) and di(2-ethylhexyl) phthalate (DEHP) in human liver microsomes. These diester phthalates were hydrolyzed to monoester phthalates (mono-n-butyl phthalate (MBP) from DBP, mono-n-butyl phthalate (MBP) and monobenzyl phthalate (MBzP) from BBzP, and mono(2-ethylhexyl) phthalate (MEHP)) by human liver microsomes. DBP, BBzP and DEHP hydrolysis showed sigmoidal kinetics in V-[S] plots, and the Hill coefficient (n) ranged 1.37-1.96. The S(50), V(max) and CL(max) values for DBP hydrolysis to MBP were 99.7 μM, 17.2nmolmin(-1)mg(-1) protein and 85.6 μL min(-1)mg(-1) protein, respectively. In BBzP hydrolysis, the values of S(50) (71.7 μM), V(max) (13.0nmolmin(-1)mg(-1) protein) and CL(max) (91.3 μL min(-1)mg(-1) protein) for MBzP formation were comparable to those of DBP hydrolysis. Although the S(50) value for MBP formation was comparable to that of MBzP formation, the V(max) and CL(max) values were markedly lower (<3%) than those for MBzP formation. The S(50), V(max) and CL(max) values for DEHP hydrolysis were 8.40 μM, 0.43 nmol min(-1)mg(-1) protein and 27.5 μL min(-1)mg(-1) protein, respectively. The S(50) value was about 10% of DBP and BBzP hydrolysis, and the V(max) value was also markedly lower (<3%) than those for DBP hydrolysis and MBzP formation for BBzP hydrolysis. The ranking order of CL(max) values for monoester phthalate formation in DBP, BBzP and DEHP hydrolysis was BBzP to MBzP≥DBP to MBP>DEHP to MEHP>BBzP to MBP. These findings suggest that the hydrolysis activities of diester phthalates by human liver microsomes depend on the chemical structure, and that the metabolism profile may relate to diester phthalate toxicities, such as hormone disruption and reproductive effects.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan.
| | | | | | | | | | | |
Collapse
|
32
|
Hanioka N, Nonaka Y, Saito K, Negishi T, Okamoto K, Kataoka H, Narimatsu S. Effect of aflatoxin B1 on UDP-glucuronosyltransferase mRNA expression in HepG2 cells. Chemosphere 2012; 89:526-529. [PMID: 22749127 DOI: 10.1016/j.chemosphere.2012.05.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2011] [Revised: 01/30/2012] [Accepted: 05/16/2012] [Indexed: 06/01/2023]
Abstract
Aflatoxin B1 (AFB1) is a potent mycotoxin that induces hepatocellular carcinoma in many animal species, including humans. In this study, we examined the effects of AFB1 on UDP-glucuronosyltransferase (UGT) mRNA expression in HepG2 cells (human hepatocellular carcinoma cell line). The cells were treated with AFB1 for 48 h at a concentration of 10 μM, and their viability (87%) was not significantly different from that of control cells. Reverse transcription polymerase chain reaction (RT-PCR) analysis demonstrated that the mRNAs of four UGT1As (UGT1A1, UGT1A3, UGT1A4 and UGT1A9) and seven UGT2Bs (UGT2B4, UGT2B7, UGT2B10, UGT2B11, UGT2B15, UGT2B17 and UGT2B28) are expressed in HepG2 cells. The mRNAs of aryl hydrocarbon receptor (AhR), pregnane X receptor (PXR), retinoid X receptor (RXR) and glucocorticoid receptor (GR) as transcriptional regulators were also detected. AFB1 significantly increased mRNA levels of UGT1A3, UGT2B10, UGT2B15 and UGT2B17 in HepG2 cells to 2.5-, 2.0-, 1.9- and 1.5-fold, respectively, whereas the mRNA levels of transcriptional regulators were hardly affected by AFB1. These findings suggest that AFB1 induces UGT2B isoforms rather than UGT1A isoforms in HepG2 cells, and that the change may closely contribute to the toxicity of AFB1.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.
| | | | | | | | | | | | | |
Collapse
|
33
|
Hanioka N, Tanaka S, Moriguchi Y, Narimatsu S. Stereoselective Glucuronidation of Carvedilol in Human Liver and Intestinal Microsomes. Pharmacology 2012; 90:117-24. [DOI: 10.1159/000340020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 06/08/2012] [Indexed: 11/19/2022]
|
34
|
Nagaoka K, Hanioka N, Ikushiro S, Yamano S, Narimatsu S. The Effects of N-Glycosylation on the Glucuronidation of Zidovudine and Morphine by UGT2B7 Expressed in HEK293 Cells. Drug Metab Pharmacokinet 2012; 27:388-97. [DOI: 10.2133/dmpk.dmpk-11-rg-135] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
35
|
Hanioka N, Iwabu H, Hanafusa H, Nakada S, Narimatsu S. Expression and Inducibility of UDP-glucuronosyltransferase 1As in MCF-7 Human Breast Carcinoma Cells. Basic Clin Pharmacol Toxicol 2011; 110:253-8. [DOI: 10.1111/j.1742-7843.2011.00790.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
36
|
Hanioka N, Matsumoto K, Saito Y, Narimatsu S. Influence of CYP2C8*13 and CYP2C8*14 Alleles on Amiodarone N-Deethylation. Basic Clin Pharmacol Toxicol 2011; 108:359-62. [DOI: 10.1111/j.1742-7843.2010.00669.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
37
|
Narimatsu S, Nakata T, Shimizudani T, Nagaoka K, Nakura H, Masuda K, Katsu T, Koeda A, Naito S, Yamano S, Miyata A, Hanioka N. Regio- and stereoselective oxidation of propranolol enantiomers by human CYP2D6, cynomolgus monkey CYP2D17 and marmoset CYP2D19. Chem Biol Interact 2010; 189:146-52. [PMID: 21184751 DOI: 10.1016/j.cbi.2010.12.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 11/22/2010] [Accepted: 12/08/2010] [Indexed: 10/18/2022]
Abstract
Toxic and pharmacokinetic profiles of drug candidates are evaluated in vivo often using monkeys as experimental animals, and the data obtained are extrapolated to humans. Well understanding physiological properties, including drug-metabolizing enzymes, of monkeys should increase the accuracy of the extrapolation. The present study was performed to compare regio- and stereoselectivity in the oxidation of propranolol (PL), a chiral substrate, by cytochrome P450 2D (CYP2D) enzymes among humans, cynomolgus monkeys and marmosets. Complimentary DNAs encoding human CYP2D6, cynomolgus monkey CYP2D17 and marmoset CYP2D19 were cloned, and their proteins expressed in a yeast cell expression system. The regio- and stereoselective oxidation of PL enantiomers by yeast cell microsomal fractions were compared. In terms of efficiency of expression in the system, the holo-proteins ranked CYP2D6=CYP2D17>>CYP2D19. This may be caused by the bulky side chain of the amino acid residue at position 119 (leucine for CYP2D19 vs. valine for CYP2D6 and CYP2D17), which can disturb the incorporation of the heme moiety into the active-site cavity. PL enantiomers were oxidized by all of the enzymes mainly into 4-hydroxyproranolol (4-OH-PL), followed by 5-OH-PL and N-desisopropylpropranolol (NDP). In the kinetic analysis, apparent K(m) values were commonly in the μM range and substrate enantioselectivity of R-PL<S-PL was observed in both K(m) and V(max) values for the formation of the three metabolites from PL enantiomers. The activity to produce NDP tended to be higher for the monkey enzymes, particularly CYP2D17, than for the human enzyme. These results indicate that in the oxidation of PL enantiomers by CYP2D enzymes, stereoselectivity is similar but regioselectivity is different between humans and monkeys.
Collapse
|
38
|
Ishizaki A, Saito K, Hanioka N, Narimatsu S, Kataoka H. Determination of polycyclic aromatic hydrocarbons in food samples by automated on-line in-tube solid-phase microextraction coupled with high-performance liquid chromatography-fluorescence detection. J Chromatogr A 2010; 1217:5555-63. [DOI: 10.1016/j.chroma.2010.06.068] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2010] [Revised: 06/15/2010] [Accepted: 06/24/2010] [Indexed: 11/26/2022]
|
39
|
Hanioka N, Tanabe N, Jinno H, Tanaka-Kagawa T, Nagaoka K, Naito S, Koeda A, Narimatsu S. Functional characterization of human and cynomolgus monkey UDP-glucuronosyltransferase 1A1 enzymes. Life Sci 2010; 87:261-8. [DOI: 10.1016/j.lfs.2010.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 06/24/2010] [Accepted: 06/30/2010] [Indexed: 10/19/2022]
|
40
|
Hanioka N, Matsumoto K, Saito Y, Narimatsu S. Functional Characterization of CYP2C8.13 and CYP2C8.14: Catalytic Activities toward Paclitaxel. Basic Clin Pharmacol Toxicol 2010; 107:565-9. [DOI: 10.1111/j.1742-7843.2010.00543.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
41
|
Shimizudani T, Nagaoka K, Hanioka N, Yamano S, Narimatsu S. Comparative study of the oxidation of propranolol enantiomers in hepatic and small intestinal microsomes from cynomolgus and marmoset monkeys. Chem Biol Interact 2010; 183:67-78. [PMID: 19853591 DOI: 10.1016/j.cbi.2009.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2009] [Revised: 10/08/2009] [Accepted: 10/13/2009] [Indexed: 11/16/2022]
Abstract
Oxidative metabolism of propranolol (PL) enantiomers (R-PL and S-PL) to 4-hydroxypropranolol (4-OH-PL), 5-OH-PL and N-deisopropylpropranolol (NDP) was examined in hepatic microsomes from cynomolgus and marmoset monkeys and in small intestinal microsomes from monkeys and humans. In hepatic microsomes, levels of oxidation activities were similar between the two monkey species, and substrate enantioselectivity (R-PL<S-PL) was observed in the formation of 5-OH-PL and/or NDP. Kinetic experiments revealed that the formation of all metabolites was biphasic in cynomolgus monkeys, whereas only the formation of NDP was biphasic in marmosets. Inhibition experiments employing human CYP antibodies and chemical inhibitors suggested that mainly CYP2D enzymes and partially CYP1A and 2C enzymes are involved in the oxidation of PL in both monkey liver microsomes. In small intestinal microsomes, activity levels were much higher in cynomolgus monkeys than in marmosets and humans and reversed substrate enantioselectivity (R-PL>S-PL) was seen in the formation of NDP in cynomolgus monkeys and humans and in the formation of 5-OH-PL in marmosets. The formation of the three metabolites in cynomolgus monkeys and the formation of NDP in marmosets were biphasic, while the formation of 4-OH-PL in humans was monophasic. From the inhibition experiments using CYP antibodies, CYP2C9 and 2C19 were thought to be involved as N-deisopropylases and CYP2D6 and 3A4 as 4-hydroxylases in human small intestine. Furthermore, CYP1A, 2C and 3A enzymes could be involved in cynomolgus monkeys and CYP2C and 3A enzymes in marmosets. These results indicate that the oxidative profile of PL in hepatic and small intestinal microsomes differ considerably among cynomolgus monkeys, marmosets and humans.
Collapse
Affiliation(s)
- Takeshi Shimizudani
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | | | | | | | | |
Collapse
|
42
|
Kuze J, Mutoh T, Takenaka T, Morisaki K, Nakura H, Hanioka N, Narimatsu S. Separate evaluation of intestinal and hepatic metabolism of three benzodiazepines in rats with cannulated portal and jugular veins: comparison with the profile in non-cannulated mice. Xenobiotica 2009; 39:871-80. [DOI: 10.3109/00498250903215382] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
43
|
Hanioka N, Tsuneto Y, Saito Y, Sumada T, Maekawa K, Saito K, Sawada J, Narimatsu S. Functional characterization of two novel CYP2C19 variants (CYP2C19*18andCYP2C19*19) found in a Japanese population. Xenobiotica 2009; 37:342-55. [PMID: 17455109 DOI: 10.1080/00498250601127038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Cytochrome P450 2C19 (CYP2C19) plays an important role in the metabolism of a wide range of therapeutic drugs and exhibits genetic polymorphism with interindividual differences in metabolic activity. We have previously described two CYP2C19 allelic variants, namely CYP2C19*18 and CYP2C19*19 with Arg329His/Ile331Val and Ser51Gly/Ile331Val substitutions, respectively. In order to investigate precisely the effect of amino acid substitutions on CYP2C19 function, CYP2C19 proteins of the wild-type (CYP2C19.1B having Ile331Val) and variants (CYP2C19.18 and CYP2C19.19) were heterologously expressed in yeast cells, and their S-mephenytoin 4'-hydroxylation activities were determined. The K(m) value of CYP2C19.19 for S-mephenytoin 4'-hydroxylation was significantly higher (3.0-fold) than that of CYP2C19.1B. Although no significant differences in V(max) values on the basis of microsomal and functional CYP protein levels were observed between CYP2C19.1B and CYP2C19.19, the V(max)/K(m) values of CYP2C19.19 were significantly reduced to 29-47% of CYP2C19.1B. By contrast, the K(m), V(max) or V(max)/K(m) values of CYP2C19.18 were similar to those of CYP2C19.1B. These results suggest that Ser51Gly substitution in CYP2C19.19 decreases the affinity toward S-mephenytoin of CYP2C19 enzyme, and imply that the genetic polymorphism of CYP2C19*19 also causes variations in the clinical response to drugs metabolized by CYP2C19.
Collapse
Affiliation(s)
- N Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Okayama, 700-8530, Japan
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Maekawa K, Yoshimura T, Saito Y, Fujimura Y, Aohara F, Emoto C, Iwasaki K, Hanioka N, Narimatsu S, Niwa T, Sawada J. Functional characterization of CYP3A4.16: Catalytic activities toward midazolam and carbamazepine. Xenobiotica 2009; 39:140-7. [DOI: 10.1080/00498250802617746] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
45
|
Hanioka N, Naito T, Narimatsu S. Human UDP-glucuronosyltransferase isoforms involved in bisphenol A glucuronidation. Chemosphere 2008; 74:33-36. [PMID: 18990428 DOI: 10.1016/j.chemosphere.2008.09.053] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2008] [Revised: 08/18/2008] [Accepted: 09/16/2008] [Indexed: 05/27/2023]
Abstract
Bisphenol A (BPA) is one of a number of potential endocrine disruptors which may affect normal hormonal function. In this study, human UDP-glucuronosyltransferase (UGT) isoforms involved in BPA glucuronidation were studied by kinetic analyses using human liver microsomes and recombinant human UGTs expressed in insect cells (UGT1A1, UGT1A3, UGT1A4, UGT1A6, UGT1A9, UGT2B4, UGT2B7, UGT2B15 and UGT2B17). BPA glucuronidation was catalyzed by UGT1A1, UGT1A3, UGT1A9, UGT2B4, UGT2B7 and UGT2B15 as well as by human liver microsomes. Among these UGTs, UGT2B15 showed the highest activity of BPA glucuronidation at low- (1.0 microM) and high- (20 microM) substrate concentrations. Kinetic analyses of BPA glucuronidation were performed by constructing Michaelis-Menten and Eadie-Hofstee plots. The kinetic profile of BPA glucuronidation by pooled human liver microsomes and UGT2B15 was monophasic, the K(m) and V(max) values were 6.39 microM and 4250 pmol min(-1)mg(-1)protein for pooled human liver microsomes, and 8.68 microM and 873 pmol min(-1)mg(-1)protein for UGT2B15, respectively. The K(m) values for BPA glucuronidation by pooled human liver microsomes and UGT2B15 were similar. These findings demonstrate that BPA is mainly glucuronidated by UGT2B15 in human liver microsomes, and suggest that this UGT isoform plays important roles in the detoxification and elimination of BPA.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | | | | |
Collapse
|
46
|
Narimatsu S, Kazamori D, Masuda K, Katsu T, Funae Y, Naito S, Nakura H, Yamano S, Hanioka N. The mechanism causing the difference in kinetic properties between rat CYP2D4 and human CYP2D6 in the oxidation of dextromethorphan and bufuralol. Biochem Pharmacol 2008; 77:920-31. [PMID: 19059219 DOI: 10.1016/j.bcp.2008.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2008] [Revised: 11/05/2008] [Accepted: 11/06/2008] [Indexed: 10/21/2022]
Abstract
The capacity to oxidize bufuralol (BF) and dextromethorphan (DEX) was compared kinetically between human CYP2D6 and four rat CYP2D (CYP2D1, -2D2, -2D3 and -2D4) isoenzymes in a yeast cell expression system. In BF 1''-hydroxylation and DEX O-demethylation, only CYP2D4 showed hook-shaped Eadie-Hofstee plots, the other four CYP2D enzymes exhibiting linear plots. In DEX N-demethylation, rat CYP2D2 did not show any detectable activity under the conditions used, whereas the other four enzymes yielded linear Eadie-Hofstee plots. To elucidate the mechanisms causing the nonlinear kinetics, four CYP2D4 mutants, CYP2D4-F109I, -V123F, -L216F and -A486F, were prepared. CYP2D4-V123F, -L216F and -A486F yielded linear or linear-like Eadie-Hofstee plots for BF 1''-hydroxylation, whereas only CYP2D4-A486F exhibited linear plots for DEX O-demethylation. The substitution of Phe-109 by isoleucine did not have any effect on the oxidative capacity of CYP2D4 for either BF or DEX. These results suggest that the introduction of phenylalanine in the active-site cavity of CYP2D4 simplifies complicated interactions between the substrates and the amino acid residues, but the mechanisms causing the simplification differ between BF and DEX.
Collapse
Affiliation(s)
- Shizuo Narimatsu
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Hanioka N, Takeda Y, Tanaka-Kagawa T, Hayashi K, Jinno H, Narimatsu S. Interaction of bisphenol A with human UDP-glucuronosyltransferase 1A6 enzyme. Environ Toxicol 2008; 23:407-12. [PMID: 18214896 DOI: 10.1002/tox.20345] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The effects of bisphenol A (BPA) on UDP-glucuronosyltransferase 1A6 (UGT1A6) activities in microsomes from human livers and yeast cells expressing human UGT1A6 (humUGT1A6) were investigated. Serotonin (5-HT) and 4-methylumbelliferone (4-MU) were used as the substrates for UGT1A6. BPA dose-dependently inhibited 5-HT and 4-MU glucuronidation activities in both enzyme sources. The IC(50) values of BPA for 5-HT and 4-MU glucuronidation activities were 156 and 163 microM for liver microsomes, and 84.6 and 80.3 microM for yeast cell microsomes expressing humUGT1A6, respectively. The inhibitory pattern of BPA for 5-HT and 4-MU glucuronidation activities in human liver microsomes exhibited a mixture of competitive and noncompetitive components, with K(i) values of 84.9 and 72.3 microM, respectively. In yeast cell microsomes expressing humUGT1A6, 5-HT glucuronidation activities were noncompetitively inhibited by BPA (K(i) value, 65.5 microM), whereas the inhibition of 4-MU glucuronidation activities by BPA exhibited the mixed type (K(i) value, 42.5 microM). These results suggest that BPA interacts with human UGT1A6 enzyme, and that the interaction may contribute to the toxicity, such as hormone disruption and reproductive effects, of BPA.
Collapse
Affiliation(s)
- Nobumitsu Hanioka
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Okayama 700-8530, Japan
| | | | | | | | | | | |
Collapse
|
48
|
Hanioka N, Tsuneto Y, Saito Y, Maekawa K, Sawada JI, Narimatsu S. Influence of CYP2C19*18 and CYP2C19*19 Alleles on Omeprazole 5-Hydroxylation: In vitro Functional Analysis of Recombinant Enzymes Expressed in Saccharomyces cerevisiae. Basic Clin Pharmacol Toxicol 2008; 102:388-93. [DOI: 10.1111/j.1742-7843.2008.00222.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
49
|
Narimatsu S, Yonemoto R, Masuda K, Katsu T, Asanuma M, Kamata T, Katagi M, Tsuchihashi H, Kumamoto T, Ishikawa T, Naito S, Yamano S, Hanioka N. Oxidation of 5-methoxy-N,N-diisopropyltryptamine in rat liver microsomes and recombinant cytochrome P450 enzymes. Biochem Pharmacol 2008; 75:752-60. [DOI: 10.1016/j.bcp.2007.09.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2007] [Revised: 09/20/2007] [Accepted: 09/21/2007] [Indexed: 10/22/2022]
|
50
|
Hanioka N, Hayashi K, Shimizudani T, Nagaoka K, Koeda A, Naito S, Narimatsu S. Stereoselective Glucuronidation of Propranolol in Human and Cynomolgus Monkey Liver Microsomes: Role of Human Hepatic UDP-Glucuronosyltransferase Isoforms, UGT1A9, UGT2B4 and UGT2B7. Pharmacology 2008; 82:293-303. [DOI: 10.1159/000165100] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Accepted: 07/23/2008] [Indexed: 11/19/2022]
|